Cervical vertebra tractor



FIG. 1 is a front, right, top perspective view of a cervical vertebra tractor showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines illustrate portions of the cervical vertebra tractor which form no part of the claimed design. 

CLAIM The ornamental design for a cervical vertebra tractor, as shown and described. 